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The patterning toolbox FIB-o-mat: Exploiting the full potential of focused helium ions for nanofabrication
/en/research/publications/the-patterning-toolbox-fib-o-mat-exploiting-the-full-potential-of-focused-helium-ions-for-nanofabrication
Focused beams of helium ions are a powerful tool for high-fidelity machining with spatial precision below 5 nm. Achieving such a high patterning precision over large areas and for different…
Electrical and optical characteristics of highly transparent MOVPE-grown AlGaN-based tunnel heterojunction LEDs emitting at 232 nm
/en/research/publications/electrical-and-optical-characteristics-of-highly-transparent-movpe-grown-algan-based-tunnel-heterojunction-leds-emitting-at-232-nm
We present the growth and electro-optical characteristics of highly transparent AlGaN-based tunnel heterojunction light-emitting diodes (LEDs) emitting at 232 nm entirely grown by metalorganic…
Comb injection into a single-mode laser
/en/research/publications/comb-injection-into-a-single-mode-laser
Temporally- and spectrally-resolved phase and intensity emission characteri-zation of amplitude-modulated optical frequency comb generation and phase noise transfer of an initially single mode laser…
Laser Diodes as Reliable Pump Source for Space-Borne Methane Remote Sensing Lidar System
/en/research/publications/laser-diodes-as-reliable-pump-source-for-space-borne-methane-remote-sensing-lidar-system
Laser diode minibars for QCW pumping Nd:YAG at 63 W were developed for the satellite MERLIN and subjected to accelerated life test. Evaluating 320 single emitters indicates a reliability of…
Ultra-narrow linewidth GaAs-based DBR Lasers
/en/research/publications/ultra-narrow-linewidth-gaas-based-dbr-lasers-1
We present a novel approach for GaAs-based DBR diode lasers with an extended cavity. The developed chips exhibit a record small 3 dB linewidth of 25 kHz @ 1 ms at the wavelength…
Wedged Nd:YVO4 crystal for wavelength tuning of monolithic passively Q-switched picosecond microchip lasers
/en/research/publications/wedged-ndyvo4-crystal-for-wavelength-tuning-of-monolithic-passively-q-switched-picosecond-microchip-lasers
We present a monolithic integrated passively Q-switched sub-150 ps microchip laser at 1064 nm with a wedged Nd:YVO4 crystal operating up to a repetition rate of 1 MHz. The wedge…
A Highly Linear Dual-Stage Amplifier With Beyond 1.75-THz Gain-Bandwidth Product
/en/research/publications/a-highly-linear-dual-stage-amplifier-with-beyond-175-thz-gain-bandwidth-product
This work reports a multipurpose highly linear ultrawideband amplifier with a gain-bandwidth product (GBP) of 1.75 THz, the highest reported in any monolithic microwave integrated circuit (MMIC)…
783 nm wavelength stabilized DBR tapered diodelasers with a 7 W output power
/en/research/publications/783-nm-wavelength-stabilized-dbr-tapered-diodelasers-with-a-7-w-output-power-1
Wavelength stabilized distributed Bragg reflector (DBR) tapered diode lasers at 783 nm will be presented. The devices are based on GaAsP single quantum wells embedded in a large optical cavity…
Optimized diamond inverted nanocones for enhanced color center to fiber coupling
/en/research/publications/optimized-diamond-inverted-nanocones-for-enhanced-color-center-to-fiber-coupling
Nanostructures can be used for boosting the light outcoupling of color centers in diamond; however, the fiber coupling performance of these nanostructures is rarely investigated. Here, we use a…
Experimental investigation of optical feedback from periodically poled crystals for nonlinear frequency conversion
/en/research/publications/experimental-investigation-of-optical-feedback-from-periodically-poled-crystals-for-nonlinear-frequency-conversion
Crystals with nonlinear optical properties are widely used for frequency conversion of laser light. Thereby wavelength ranges beyond the laser’s emission spectrum can be reached [1] enabling new…